<p>Abelian PDSs have been extensively researched for decades, but research on non-abelian PDSs remains limited. Due to the fact that many techniques applicable to abelian groups cannot be directly applied to non-abelian cases, the study of non-abelian PDSs becomes challenging. In this paper, we use <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10801_2025_1403_Article_IEq1.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="64" /> </InlineMediaObject> <EquationSource Format="TEX">\(A_p(m,\theta )\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>A</mi> <mi>p</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mi>m</mi> <mo>,</mo> <mi>θ</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> to represent the Suzuki <i>p</i>-groups of type A, which belong to a category of non-abelian <i>p</i>-groups. We combine tools from representation theory and character theory to explore these non-abelian groups, focusing on central PDSs, DSs, and linking systems. When the order of <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10801_2025_1403_Article_IEq2.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">\(\theta \)</EquationSource> <EquationSource Format="MATHML"><math> <mi>θ</mi> </math></EquationSource> </InlineEquation> is even, we establish some non-existence results for central PDSs in <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10801_2025_1403_Article_IEq3.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="64" /> </InlineMediaObject> <EquationSource Format="TEX">\(A_p(m, \theta )\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>A</mi> <mi>p</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mi>m</mi> <mo>,</mo> <mi>θ</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> for <i>p</i> an odd prime and show that no non-trivial central DSs exist in <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10801_2025_1403_Article_IEq4.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="64" /> </InlineMediaObject> <EquationSource Format="TEX">\(A_2(m, \theta )\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>A</mi> <mn>2</mn> </msub> <mrow> <mo stretchy="false">(</mo> <mi>m</mi> <mo>,</mo> <mi>θ</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation>. Additionally, when the order of <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10801_2025_1403_Article_IEq2.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">\(\theta \)</EquationSource> <EquationSource Format="MATHML"><math> <mi>θ</mi> </math></EquationSource> </InlineEquation> is odd, we construct some new infinite families of Latin square type central PDSs in <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10801_2025_1403_Article_IEq3.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="64" /> </InlineMediaObject> <EquationSource Format="TEX">\(A_p(m, \theta )\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>A</mi> <mi>p</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mi>m</mi> <mo>,</mo> <mi>θ</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> applicable to any odd prime <i>p</i>; we construct central DSs and explore some (reduced) linking systems of DSs in <InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10801_2025_1403_Article_IEq4.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="64" /> </InlineMediaObject> <EquationSource Format="TEX">\(A_2(m, \theta )\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>A</mi> <mn>2</mn> </msub> <mrow> <mo stretchy="false">(</mo> <mi>m</mi> <mo>,</mo> <mi>θ</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation>.</p>

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On central partial difference sets in non-abelian p-groups

  • Wendi Di,
  • Zhiwen He

摘要

Abelian PDSs have been extensively researched for decades, but research on non-abelian PDSs remains limited. Due to the fact that many techniques applicable to abelian groups cannot be directly applied to non-abelian cases, the study of non-abelian PDSs becomes challenging. In this paper, we use \(A_p(m,\theta )\) A p ( m , θ ) to represent the Suzuki p-groups of type A, which belong to a category of non-abelian p-groups. We combine tools from representation theory and character theory to explore these non-abelian groups, focusing on central PDSs, DSs, and linking systems. When the order of \(\theta \) θ is even, we establish some non-existence results for central PDSs in \(A_p(m, \theta )\) A p ( m , θ ) for p an odd prime and show that no non-trivial central DSs exist in \(A_2(m, \theta )\) A 2 ( m , θ ) . Additionally, when the order of \(\theta \) θ is odd, we construct some new infinite families of Latin square type central PDSs in \(A_p(m, \theta )\) A p ( m , θ ) applicable to any odd prime p; we construct central DSs and explore some (reduced) linking systems of DSs in \(A_2(m, \theta )\) A 2 ( m , θ ) .